3.4.21.12 Eglin c very effective inhibitor 2653 3.4.21.12 Eglin c - 2653 3.4.21.12 guanidine hydrochloride 1% residual activity in the presence of 4 mM guanidine hydrochloride 1048 3.4.21.12 methoxysuccinyl-Ala-Ala-Pro-L-boroPhe the carboxylate of the C-terminal amino acid residue is replaced with B(OH)2. Boron-11 pure quadrupole resonance investigation indicates close to tetrahedral boron coordination in the active site of the enzyme/inhibitor complex 117726 3.4.21.12 methoxysuccinyl-Ala-Ala-Pro-L-boroVal the carboxylate of the C-terminal amino acid residue is replaced with B(OH)2. Boron-11 pure quadrupole resonance investigation indicates tetrahedral boron coordination in the active site of the enzyme/inhibitor complex 117725 3.4.21.12 additional information - 2 3.4.21.12 additional information mechanism 2 3.4.21.12 additional information lyophilization induces a structural change in the enzyme that is not reversed by redissolution in water. The structural change reduces the mobility of the active-site histidine residue and the catalytic activity of the enzyme. The application of mild pressure to solutions of the altered enzyme reverses the lyophilization-induced structural change and restores the mobility of the histidine residue and the enzyme's catalytic activity 2 3.4.21.12 N-terminal 166 amino acid Pro region of alpha-lytic protease dual role of folding and inhibition 101143 3.4.21.12 N-Tert-butyloxycarbonylalanylpropylvaline boronic acid - 46343